Abstract
This chapter describes the high-performance phosphorus adsorbent, PAdeCS®, which is produced from concrete sludge. The concrete sludge is a slurried, strong alkali waste that is generated in a concrete pole and pile manufacturing plant in Japan. PAdeCS® is a powdery granulate that can be used as a phosphorus-recovery agent for dissolved phosphate. The precipitation of hydroxyapatite is the dominant mechanism for phosphate removal from aqueous solution by PAdeCS®. Because of the high calcium content of PAdeCS®, the recovered phosphorus product can be used as a slow-release phosphorus fertilizer. The phosphorus-removal performance of PAdeCS® was compared with that of conventional phosphorus-removal agents such as polyferric sulfate, aluminum polychloride, and aluminum sulfate. PAdeCS® showed the highest phosphorus-removal performance among them. PAdeCS®, which is produced from concrete sludge, can be used widely as an inexpensive phosphorus-recovery agent.
| Original language | English |
|---|---|
| Title of host publication | Phosphorus Recovery and Recycling |
| Publisher | Springer Singapore |
| Pages | 449-456 |
| Number of pages | 8 |
| ISBN (Electronic) | 9789811080319 |
| ISBN (Print) | 9789811080302 |
| DOIs | |
| Publication status | Published - 2018 May 25 |
Keywords
- Concrete sludge
- Ettringite
- Fertilizer
- Hydroxyapatite
- PAdeCS®
- Phosphorus adsorbent
ASJC Scopus subject areas
- Environmental Science(all)
- Engineering(all)
- Chemical Engineering(all)
